;-----------------------------------------------------------------------------
; Zero page stuff

WNDLFT  :=	$20	; Text window left
WNDWDTH :=	$21	; Text window width
WNDTOP  :=	$22	; Text window top
WNDBTM  :=	$23	; Text window bottom+1
CH      :=	$24	; Cursor horizontal position
CV      :=	$25	; Cursor vertical position
BASL    :=	$28	; Text base address low
BASH    :=	$29	; Text base address high
INVFLG  :=	$32	; Normal/inverse(/flash)
PROMPT  :=	$33	; Used by GETLN
RNDL    :=	$4E	; Random counter low
RNDH    :=	$4F	; Random counter high
HIMEM   :=	$73	; Highest available memory address+1

;-----------------------------------------------------------------------------
; Vectors

DOSWARM :=	$03D0	; DOS warmstart vector
BRKVec  :=	$03F0	; Break vector
SOFTEV  :=	$03F2	; Vector for warm start
PWREDUP :=	$03F4	; This must be = EOR #$A5 of SOFTEV+1

;-----------------------------------------------------------------------------
; Hardware

; Keyboard input
KBD     :=	$C000	; Read keyboard
KBDSTRB :=	$C010	; Clear keyboard strobe

; 80 column card switches
CLRALTCHAR :=   $C00E	; Normal Apple II char set
SETALTCHAR :=   $C00F	; Norm/inv LC, no flash
ALTCHARSET :=   $C01E	; >127 if alt charset switched in
RD80VID :=      $C01F	; >127 if 80 column video enabled

; Video soft switches
MIXCLR  :=	$C052	; Disable 4 lines of text
MIXSET  :=	$C053	; Enable 4 lines of text
LOWSCR  :=	$C054	; Page 1
HISCR   :=	$C055	; Page 2

; Game controller
BUTN0   :=	$C061	; Open-Apple Key
BUTN1   :=	$C062	; Closed-Apple Key